| 序号 | 题目：4,8,8,12 | |
|---|---|---|
| 1 | ((8 + 8) + 12) − 4 | |
| 2 | ((12 + 8) − 4) + 8 | |
| 3 | ((12 + 8) + 8) − 4 | |
| 4 | (12 + 8) + (8 − 4) | |
| 5 | (4 × (12 − 8)) + 8 | |
| 6 | (8 + 8) + (12 − 4) | |
| 7 | (8 + (12 − 4)) + 8 | |
| 8 | (12 + (8 − 4)) + 8 | |
| 9 | 12 + ((8 + 8) − 4) | |
| 10 | 12 + (8 + (8 − 4)) | |
| 11 | (12 × 8) ÷ (8 − 4) | |
| 12 | 12 × (8 ÷ (8 − 4)) | |
| 13 | 8 × (12 ÷ (8 − 4)) | |
| 14 | 12 ÷ ((8 − 4) ÷ 8) | |
| 15 | 8 ÷ ((8 − 4) ÷ 12) | |